docs: def query_edges_by_pubmed_identifiers(self, pubmed_identifiers: List[str]) -> List[Edge]:
          """Get all edges annotated to the documents identified by the given PubMed identifiers."""
          fi = and_(Citation.type == CITATION_TYPE_PUBMED, Citation.reference.in_(pubmed_identifiers))
          return self.session.query(Edge).join(Evidence).join(Citation).filter(fi).all()